cat /proc/drbd

drbdadm status

drbdadm adjust jtelshared

drbdadm disconnect jtelshared

drbdadm down jtelshared

drbdadm up jtelshared

drbdadm primary jtelshared

drbdadm connect jtelshared

cat /proc/drbd --> GIT-hash: a4d5de01fffd7e4cde48a080e2c686f9e8cebf4c build by mockbuild@, 2017-09-15 14:23:22 1: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r----- ns:0 nr:119823323 dw:119823323 dr:2128 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0

drbdadm status --> jtelshared role:Primary disk:UpToDate tdm-jtel-lb-2-pn-1 connection:Connecting drbdadm status --> # No currently configured DRBD found.

pcs status --> Cluster name: portal Stack: corosync Current DC: acd-store1 (version 1.1.16-12.el7_4.7-94ff4df) - partition with quorum Last updated: Sun Mar 18 18:05:32 2018 Last change: Fri Feb 16 00:07:51 2018 by root via cibadmin on acd-store2 2 nodes configured 3 resources configured Node acd-store1: standby Online: [ acd-store2 ] Full list of resources: Resource Group: haproxy_group ClusterDataJTELSharedMount (ocf::heartbeat:Filesystem): Started acd-store2 ClusterIP (ocf::heartbeat:IPaddr2): Started acd-store2 samba (systemd:smb): Started acd-store2 Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled

pcs status --> Cluster name: jtel_cluster Cluster Summary: * Stack: corosync * Current DC: acd-lb1 (version 2.0.3-5.el8_2.1-4b1f869f0f) - partition with quorum * Last updated: Sat Oct 3 12:39:22 2020 * Last change: Sat Oct 3 12:31:22 2020 by root via cibadmin on acd-lb2 * 2 nodes configured * 5 resource instances configured Node List: * Online: [ acd-lb1 ] * OFFLINE: [ acd-lb2 ] Full List of Resources: * Clone Set: DRBDClusterMount-clone [DRBDClusterMount] (promotable): * Masters: [ acd-lb1 ] * Stopped: [ acd-lb2 ] * DRBDClusterFilesystem (ocf::heartbeat:Filesystem): Started acd-lb1 * Samba (systemd:smb): Started acd-lb1 * ClusterIP (ocf::heartbeat:IPaddr2): Started acd-lb1 Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled

umount /srv/jtel/shared drbdadm disconnect jtelshared drbdadm secondary jtelshared drbdadm connect --discard-my-data jtelshared

drbdadm primary jtelshared drbdadm connect jtelshared

[root@storage01 ~]# cat /proc/drbd version: 8.4.10-1 (api:1/proto:86-101) GIT-hash: a4d5de01fffd7e4cde48a080e2c686f9e8cebf4c build by mockbuild@, 2017-09-15 14:23:22 1: cs:SyncTarget ro:Secondary/Primary ds:Inconsistent/UpToDate C r----- ns:0 nr:1411538 dw:121234862 dr:2128 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:184698664 [>....................] sync'ed: 0.8% (180368/181744)M finish: 26:12:15 speed: 1,940 (2,760) want: 2,120 K/sec

drbdadm disk-options --c-plan-ahead=0 --resync-rate=110M jtelshared

drbdadm primary jtelshared   --> Verify this with   cat /proc/drbd

pcs cluster unstandby acd-lb-broken   --> Verify this with   pcs status

pcs cluster start acd-lb-broken pcs node unstandby acd-lb-broken   --> Verify this with   pcs status

drbdadm adjust jtelshared

pcs status # CentOS 7.x cat /proc/drbd # CentOS 8.x drbdadm status # On some other linux machines ls /home/jtel/shared # Windows dir //acd-store/shared

[17354513.483526] XFS (drbd1): log mount/recovery failed: error -22 [17354513.483569] XFS (drbd1): log mount failed [17355040.104433] XFS (drbd1): Mounting V5 Filesystem [17355040.122234] XFS (drbd1): Corruption warning: Metadata has LSN (56:112832) ahead of current LSN (56:112733). Please unmount and run xfs_repair (>= v4.3) to resolve. [17355040.122239] XFS (drbd1): log mount/recovery failed: error -22 [17355040.122322] XFS (drbd1): log mount failed

xfs_repair /dev/drbd/by-res/jtelshared/0 pcs resource cleanup